:root {
  color-scheme: light;
  --ink: #14231c;
  --muted: #5e6e65;
  --green: #176344;
  --mint: #dff4e8;
  --line: #dce5df;
  --paper: #f4f7f2;
  font-family: Inter, Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { background: #f8faf7; color: var(--ink); }
body { margin: 0; }
a { color: inherit; }
code { font-family: "SFMono-Regular", Consolas, monospace; }
.topbar { height: 64px; display: flex; align-items: center; justify-content: space-between; max-width: 1180px; margin: auto; padding: 0 24px; border-bottom: 1px solid var(--line); }
.topbar .brand { color: var(--green); font-size: 20px; font-weight: 900; text-decoration: none; letter-spacing: -.04em; }
.topbar span { color: var(--muted); font-size: 13px; font-weight: 700; }
main { max-width: 1180px; margin: auto; padding: 34px 24px 70px; }
.hero { position: relative; overflow: hidden; padding: 68px 62px; border: 1px solid #e0e9e2; border-radius: 30px; background: radial-gradient(circle at 82% 0%, #d9eee3 0, transparent 32%), linear-gradient(135deg, #f2f8f0, #f8f5e9); }
.hero::after { content: ""; position: absolute; width: 300px; height: 300px; right: 5%; top: -220px; border: 1px solid rgba(23, 99, 68, .12); border-radius: 50%; box-shadow: 0 0 0 48px rgba(23, 99, 68, .025), 0 0 0 96px rgba(23, 99, 68, .02); }
.hero-copy { position: relative; z-index: 1; max-width: 820px; }
.eyebrow { color: var(--green); font-size: 11px; font-weight: 900; letter-spacing: .15em; }
h1 { max-width: 900px; margin: 0 0 24px; font-size: clamp(42px, 5vw, 66px); line-height: 1.06; letter-spacing: -.06em; }
.hero-copy p { max-width: 680px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.8; word-break: keep-all; }
.web-notice { display: block; margin-top: 5px; color: #718078; font-size: 13px; }
section:not(.hero) { padding-top: 86px; }
h2 { margin: 10px 0 0; font-size: clamp(29px, 3.5vw, 42px); letter-spacing: -.045em; }
.steps-section { margin-top: 86px; padding: 54px !important; border: 1px solid #dbe7dd; border-radius: 28px; background: linear-gradient(145deg, #f0f7f1 0%, #faf8ef 100%); box-shadow: 0 22px 60px rgba(36, 67, 49, .06); }
.section-heading > p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.prompt-box { display: flex; gap: 12px; align-items: center; margin: 20px 0 10px; padding: 18px; border: 1px solid #a9d4bc; border-radius: 14px; background: #f1fbf5; }
.prompt-box code { flex: 1; color: #204b37; font-size: 14px; line-height: 1.6; overflow-wrap: anywhere; }
.prompt-box button { flex: none; padding: 10px 13px; border: 0; border-radius: 10px; background: var(--green); color: #fff; font: inherit; font-size: 12px; font-weight: 800; cursor: pointer; }
.section-heading { margin-bottom: 28px; }
.steps { display: flex; flex-direction: column; gap: 12px; margin: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 38px minmax(0, 1fr); gap: 20px; padding: 26px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255, 255, 255, .86); }
.steps > li > span { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 50%; background: var(--green); color: #fff; font-size: 12px; font-weight: 900; }
.step-content { min-width: 0; }
.steps h3 { margin: 6px 0 9px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.security-section { display: grid; grid-template-columns: 1fr; gap: 30px; margin-top: 86px; padding: 52px !important; border: 1px solid #cfdfd4; border-radius: 24px; background: linear-gradient(135deg, #e5f1e9 0%, #f4f2e8 100%); color: var(--ink); box-shadow: 0 22px 60px rgba(36, 67, 49, .06); }
.security-section h2 { color: #244333; }
.security-section ul { display: grid; gap: 16px; margin: 0; padding: 0; list-style: none; }
.security-section li { position: relative; padding-left: 21px; color: #5b6c62; font-size: 13px; line-height: 1.7; }
.security-section li::before { content: ""; position: absolute; left: 0; top: .68em; width: 8px; height: 8px; border-radius: 50%; background: #67a582; }
.security-section li b { color: #315b45; }
.security-content { display: grid; gap: 18px; }
.privacy-disclaimer { margin: 0; padding-top: 15px; border-top: 1px solid rgba(49, 91, 69, .16); color: #6d786f; font-size: 12px; line-height: 1.65; }
@media (max-width: 860px) { .hero { padding: 42px 38px; } }
@media (max-width: 560px) { main { padding-inline: 16px; }.hero { padding: 34px 28px; border-radius: 22px; } h1 { font-size: 39px; }.steps-section { padding: 30px 22px !important; }.steps li { grid-template-columns: 34px minmax(0, 1fr); gap: 14px; padding: 21px 18px; }.prompt-box { align-items: stretch; flex-direction: column; }.security-section { padding: 30px !important; } }